TREATMENT OF DATA ERROR IN MFA AND A METHOD OF ESTIMATION OF ELECTRICAL HOME APPLIANCE FLOWS BY MINIMIZING ERROR

摘要

This study examined three methods to treat the error of flow data in MFA (Material Flow Analysis), descriptive method, sequential correction method, and simultaneous correction method, clarifying the pros and cons of these three methods. The authors have considered a method fall under simultaneous correction method1'; however, the method has not been established. This study therefore examined and established the method to estimate flows and minimize the error of flow data, and applied to estimation of flows of waste electrical home appliances in Japan. As a result of estimation, approximately 50 percent of all domestically-waste electrical home appliances were recycled, approximately 30 percent were dealt with at industrial waste treatment facilities to recover materials, and approximately 20 percent were exported as second-hand products.